Thomas Aynsley Cook was a British operatic bass-baritone of the Victorian era. Among others, he originated the role of José the Wolf in The Contrabandista by Arthur Sullivan and F. C. Burnand in 1867. He sang the role of Devilshoof in The Bohemian Girl, about 430 times.

The Contrabandista, or The Law of the Ladrones, is a two-act comic opera by Arthur Sullivan and F. C. Burnand. It premiered at St. George's Hall, in London, on 18 December 1867 under the management of Thomas German Reed, for a run of 72 performances. There were brief revivals in Manchester in 1874 and America in 1880. In 1894, it was revised into a new opera, The Chieftain, with a completely different second act.